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High-quality donor heart is the prerequisite and fundamental guarantee for successful heart transplantation. Reasonable donor heart preservation technique plays a key role in improving the quality of donor heart and the prognosis of heart transplantation. Static cold storage (SCS) is currently the standard preservation technique for cardiac allograft. However, it is prone to cause severe cold ischemia injury to the donor heart, and it is impossible to evaluate heart function during SCS. As an important emerging technique of organ preservation, machine perfusion better matches with physiological conditions compared with SCS, which may remove metabolic wastes and provide basic substances for metabolic needs during organ preservation, prolong the preservation time and improve the preservation effect to a certain extent. Besides, it may also effectively evaluate organ function and improve clinical prognosis of heart transplantation. Meantime, it can also repair organ damage, significantly optimize organ quality and improve the utilization rate of donor organs. In this article, research status of machine perfusion of donor heart was reviewed.
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Defining and visualizing the three-dimensional (3D) structures of pharmaceuticals provides a new and important tool to elucidate the phenomenal behavior and underlying mechanisms of drug delivery systems. The mechanism of drug release from complex structured dosage forms, such as bilayer osmotic pump tablets, has not been investigated widely for most solid 3D structures. In this study, bilayer osmotic pump tablets undergoing dissolution, as well as after dissolution in a desiccated solid state were examined, and visualized by synchrotron radiation micro-computed tomography (SR-μCT). In situ formed 3D structures at different in vitro drug release states were characterized comprehensively. A distinct movement pattern of NaCl crystals from the push layer to the drug layer was observed, beneath the semi-permeable coating in the desiccated tablet samples. The 3D structures at different dissolution time revealed that the pushing upsurge in the bilayer osmotic pump tablet was directed via peripheral "roadways". Typically, different regions of the osmotic front, infiltration region, and dormant region were classified in the push layer during the dissolution of drug from tablet samples. According to the observed 3D microstructures, a "subterranean river model" for the drug release mechanism has been defined to explain the drug release mechanism.
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Objective:To evaluate the predictive value of the serum N-terminal pro-B-type natriuretic peptide (NT-proBNP) concentration for postoperative acute kidney injury (AKI) in neonates undergoing cardiac surgery.Methods:Perioperative data of 110 consecutive neonates (≤28 days) who underwent cardiac surgery in our hospital from October 2017 to May 2021, were collected retrospectively.According to pROCK criteria, the patients were divided into AKI group and non-AKI group.Demographics, predominant diagnosis, laboratory examination, perioperative management and postoperative outcomes were compared between two groups.The concentration of serum NT-proBNP was routinely measured within 12 h after operation.Multivariate logistic regression analysis was performed for the association between serum NT-proBNP and postoperative AKI.Receiver operating characteristic curve was drawn, and the predictive value of serum NT-proBNP for postoperative AKI was determined according to the area under the curve.Results:A total of 106 neonates were enrolled, and the incidence of postoperative AKI was 54.7%.There were significant difference in the baseline hemoglobin concentration, hematocrit and serum creatinine and serum NT-proBNP concentration between AKI group and non-AKI group ( P<0.05). Multivariate logistic regression analysis indicated that NT-proBNP level was an independent risk factor for AKI after cardiac surgery in neonates ( odds ratio 2.49, 95% confidence interval 1.183-5.23, P=0.016). The area under the curve of NT-proBNP predicting AKI after cardiac surgery was 0.66 (95% confidence interval 0.56-0.76, P=0.007). Conclusions:Elevated serum NT-proBNP concentration is an independent risk factor for AKI after cardiac surgery in neonates and has a certain predictive value for AKI, and close monitoring of perioperative NT-proBNP level is helpful for early identification of high-risk neonates.
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OBJECTIVE：To construct the evaluation system for TCM pharmaceutical care quality in public hospitals of Jilin province，and to provide reference for improving the quality of TCM pharmaceutical care in public hospitals. METHODS ：On Nov. 2020，20 relevant personnel and 10 experts in the field of TCM in Jilin province were selected by theoretical sampling method and objective sampling method ，respectively；grounded theory and Delphi method were adopted to sort out and score the evaluation system of TCM pharmaceutical care quality in public hospitals. Analytic hierarchy process （AHP）was used to determine the weight of each index. RESULTS ：In the two rounds of evaluation ，experts’enthusiasm，authority and opinion coordination were relatively high. Finally ，the evaluation system of TCM pharmaceutical care quality in public hospitals of Jilin Province was constructed ， consisting of 5 criterion layer indexes and 27 field layer indexes. The weights of the five criterion layer indexes from high to low are 0.290 for TCM pharmaceutical care management ，0.283 for TCM pharmaceutical care equipment ，0.163 for TCM prescription rationality，0.150 for TCM quality management ，0.144 for TCM pharmaceutical care ability. CONCLUSIONS ：The evaluation system of TCM pharmaceutical care quality in public hospitals of Jilin province established in this study is scientific and applicable ， and provides a basis for improving the quality of TCM pharmaceutical care in public hospitals. Public hospitals can set up priority improvement dimensions according to the results of the quality evaluation system ，and focus the limited human and material resources on priority improvement indexes.
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OBJECTIVE@#To explore the effect of mild hypothermia on inflammatory response and angiogenesis in brain tissues of rats with intracerebral hemorrhage (ICH) and its possible mechanism for improving behavioral deficits of the rats After ICH.@*METHODS@#A total of 120 healthy male SD rats were randomly divided into sham operation group, ICH group and mild hypothermia group. Rat models of ICH were established in the latter two groups by stereotactic injection of autogenous blood in the brain, and the rats in the sham operation group received injection of normal saline in the same manner. At 15 min after modeling, the rats in hypothermia group were subjected to mild hypothermia (30-32 ℃) for 8 h followed by rewarming (37-38 ℃); the body temperature was maintained at 37-38 ℃ in the other two groups. At 2, 4, 7, 14 and 21 days after the treatment, Longa scoring, balance beam scoring and Berderson scoring were used to evaluate the behavioral deficits of the rats. Immunohistochemical staining was used to detect the protein expressions of tumor necrosis factor-α (TNF-α) and nuclear factor-κB (NF-κB) in the brain tissue of the rats, and the mRNA expressions of α subunit of hypoxia-inducible factor 1 (HIF1-α) and vascular endothelial growth factor (VEGF) were detected using RT- PCR.@*RESULTS@#At 2, 4, 7, 14 and 21 days after the treatment, the behavioral scores of the rats were significantly higher in ICH group and mild induced hypothermia group than in the sham operation group ( < 0.05 or 0.01). The protein expressions of TNF-α and NF-κB and mRNA expressions of HIF1-α and VEGF were significantly higher in ICH group and mild hypothermia group than in the sham operation group ( < 0.01). The behavioral scores were significantly lower in mild hypothermia group than in ICH group ( < 0.05), and the protein expressions of TNF-α and NF-κB were lower and the mRNA expressions of HIF1- α and VEGF were higher in mild hypothermia group than in ICH group ( < 0.05 or 0.01).@*CONCLUSIONS@#Mild hypothermia can improve behavioral deficits in rats with ICH possibly by antagonizing brain inflammation and promoting angiogenesis.
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Objective:To investigate the clinical outcomes of selective major aortopulmonary collaterals(MAPCAs) unifocalization and report histopathological findings in patients with pulmonary atresia with ventricular septal defect and major aortopulmonary collaterals(PA/VSD/ MAPCAs).Methods:The study enrolled 6 MAPCAs/VSD/PA patients with age ranged from 6 to 96 months and body weight ranged from 5.0 to 23.0 kg. These patients underwent selective MAPCAs unifocalization and primary repairs. Preoperative cardiac catheter, selective arteriography, cardiac CTA and intraoperative pathology were performed to identify different function, anatomic distribution and histopathology of MAPCAs.Results:6 MAPCAs/VSD/PA patients underwent selective MAPCAs unifocalization and primary repair. No death occurred after operation and at follow-up which lasted for 1 to 20 months. Preoperative cardiac catheter, selective arteriography and intraoperative histopathology demonstrated distribution of functional MAPCAs similar to native pulmonary artery arborization and participating in arterial gas exchange. Functional MAPCAs were classified into elastic arteries according to histopathology.Conclusion:There are two histological type of MAPCAs which play different roles. Selective unifocalization to functional MAPCAs which are classified into elastic arteries like native pulmonary artery is a safe and effective treatment approach for PA/VSD/MAPCAs.
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Objective@#To investigate the clinical outcomes of selective major aortopulmonary collaterals(MAPCAs) unifocalization and report histopathological findings in patients with pulmonary atresia with ventricular septal defect and major aortopulmonary collaterals(PA/VSD/ MAPCAs).@*Methods@#The study enrolled 6 MAPCAs/VSD/PA patients with age ranged from 6 to 96 months and body weight ranged from 5.0 to 23.0 kg. These patients underwent selective MAPCAs unifocalization and primary repairs. Preoperative cardiac catheter, selective arteriography, cardiac CTA and intraoperative pathology were performed to identify different function, anatomic distribution and histopathology of MAPCAs.@*Results@#6 MAPCAs/VSD/PA patients underwent selective MAPCAs unifocalization and primary repair. No death occurred after operation and at follow-up which lasted for 1 to 20 months. Preoperative cardiac catheter, selective arteriography and intraoperative histopathology demonstrated distribution of functional MAPCAs similar to native pulmonary artery arborization and participating in arterial gas exchange. Functional MAPCAs were classified into elastic arteries according to histopathology.@*Conclusion@#There are two histological type of MAPCAs which play different roles. Selective unifocalization to functional MAPCAs which are classified into elastic arteries like native pulmonary artery is a safe and effective treatment approach for PA/VSD/MAPCAs.
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OBJECTIVE@#To explore the genetic basis for a fetus featuring growth restriction and validate the effectiveness of a novel noninvasive prenatal testing (NIPT) technique for the detection of chromosomal microdeletions.@*METHODS@#Next-generation sequencing(NGS) and fluorescence in situ hybridization(FISH) were used to analyze the DNA of the fetus. Conventional G-banding was used to analyze the karyotypes of the fetus and its parents. High-throughput sequencing was used to analyze free fetal DNA.@*RESULTS@#NGS analysis has revealed a 4.88 Mb deletion at 15q11.2-q13.1 region in the fetus, which has a 99% overlap with the critical region of Prader-Willi syndrome (Type 2) and Angelman syndrome (Type 2) and encompassed critical genes including SNRPN and UBE3A. NIPT also revealed a 4.6 Mb deletion at 15q12, which was consistent with the results of fetal cord blood and amniotic DNA testing. FISH assay has confirmed the result of NGS. By karyotying, all subjects showed a normal karyotypes at a level of 320~400 bands.@*CONCLUSION@#It is quite necessary to carry out genetic testing on fetuses showing growth restriction. NIPT for fetal chromosomal microdeletions/microduplication syndromes is highly accurate for the diagnosis of Prader-Willi/Angelman syndrome.
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Female , Humans , Pregnancy , Angelman Syndrome , Chromosome Banding , Chromosomes, Human, Pair 15 , Fetus , In Situ Hybridization, Fluorescence , Prader-Willi SyndromeABSTRACT
OBJECTIVE： To rapidly identify chemical components of Zhitong huazheng capsules （shorted for “ZTHZC”）， and to provide reference for further elucidating the pharmacodynamic material basis and overall quality control. METHODS： UPLC-Q-TOF/MS method was adopted to separate the chemical components of ZTHZC. By reviewing literatures that related to chemical components of ZTHZC and its single Chinese traditional medicinal crops， the chemical structure of the chemical components was saved into a .mol format file， and supplemented the UNIFI database. The chemical constituents of ZTHZC were qualitatively analyzed by UNIFI database screening， and validated according to their precise molecular mass， characteristic ions， neutral loss， secondary mass spectrometry cleavage， chromatographic retention behavior， combined reference information and literature reports. RESULTS： A total of 70 chemical components were identified in this experiment， including 38 organic acids and organic acid esters， 8 alkaloids， 9 flavonoids， 5 triterpenoid saponins， 5 aldehydes， 2 ketones， 1 quinone， 1 polyacetylene and 1 monoterpenoid. CONCLUSIONS： This study provides a rapid detection and identification method for chemical components of ZTHZC， and also provides a scientific basis for the clarification of ZTHZC’s quality control and pharmacodynamics.
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Objective To summarize the surgical strategies of orthotopic cardiac transplantation for congenital dextrocardia .Methods Three patients with congenital dextrocardia suffered from endstage heart failure and underwent orthotopic cardiac transplantation from March 2014 to September 2017 .They were aged 10 ,29 ,13 years respectively .Donor hearts were from brain death donors and procured with extra length on inferior vena cava , aorta and pulmonary artery tissues . After cardiectomy , left atrial-atrial anastomosis was performed initially between donor ' s left-upper pulmonary vein orifices and recipient's left-lower pulmonary vein orifices .Apex was orientated at a 90 degrees' clockwise to right . Then aorta ,inferior and superior vena cava and last pulmonary artery were anastomosed continuously . The prosthetic conduits were also used owing to a lack of tissue . Results All operations were successful . The cold ischemic time was (130-375 ) (251 .00 ± 122 .53) min ,cardiopulmonary bypass time (127-212 )(179 .67 ± 55 .72 ) min and aortic clamp time (38-105 ) (65 .33 ± 35 .166) min . Two patients had stable hemodynamics and recovered well after HTx .During a follow-up period of 1 .5-3 .5 years , echocardiography showed excellent cardiac functions without blood flow obstruction . Chest radiology showed well-placed donor heart in right mediastinum .One left-sided patient with total cavopulmonary connection before HTx died at 59 days after HTx because of pneumonia and multiple organ failure .Conclusions Heart transplantation is curative for patients with congenital dextrocardia and surgical strategies are the key factor of successful treatment .
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When having completed the treatments of acute disease ,the hospitalized elderly patients are often not able to return home immediately due to poor physical and mental conditions. They need a period of integrated medical care for recovering independent living ability. Intermediate care provides appropriate treatment and intensive rehabilitation for elderly patients in a relatively short period after acute diseases to restore optimal health ,reduce readmission ,and return self-care ability as far as possible. Intermediate care can fill the gap between acute-term treatment and long-term care. This review is about the development of intermediate care ,the mode and the research of intermediate care in different countries ,equipment configuration and human resource allocation ,and the outlook for intermediate care.
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In order to make the pharmacy work of the county, township and community hospitals in our city gradually be undertaken by specially trained pharmacists, our hospital has carried out standardized and systematic training for pharmacists in primary hospitals and pharmacists who have just entered their posts, so that the trainees can basically master standardized prescription examination, dispensing, drug administration and pharmaceutical care as well as other related skills. At the same time, according to the actual training in our hospital, the status quo and existing problems of standardized training of pharmacists in our hospital have been summarized, and some suggestions for future pharmacist training have been put forward.
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Objective@#To analyze pre- and post-operation electrocardiograms (ECGs) features of patients underwent orthotopic heart transplantation (OHT), and provide evidences for identifying and analyzing post OHT ECGs.@*Methods@#Nine hundreds and ninty-eight pre- and post- OHT standard 12-leads ECGs from 110 consecutive patients, who underwent OHT in our hospital from May 2008 to May 2014, were analyzed.@*Results@#The mean heart rate(HR)was (86.9±16.4) beats per minute before OHT, and (100.0±0.4) beats per minute after OHT. P wave′s amplitude, duration, amplitude multiplied by duration of donor heart in lead Ⅱ were (0.124±0.069)mV, (111.1±17.2)ms, (14.34±9.51)mV·ms before OHT; (0.054±0.037)mV, (86.9±27.0)ms, (5.02±4.03)mV·ms at 1 month after OHT; (0.073±0.049)mV, (93.9±17.5) ms, (7.00±4.81)mV·ms at 6 years after OHT. ECGs rotation occurred in 83.64%(92/110) patients after OHT, and prevalence of clockwise rotation was 76.36%(84/110). Sinus tachycardia was evidenced in 99.09%(109/110) patients after OHT, and incomplete right bundle branch block was present in 60.91%(67/110) patients after OHT. Pseudo complete atrioventricular block mostly occurred at 2 days after OHT. Prevalence of double sinus rhythm was 27.95%(263/941) post OHT, 40% of them occurred between the 1st and the 2nd month post OHT; the atrial rate of recipient hearts was (104.0±10.2) beats per minucte between the 3rd and the 6th month post OHT, and was (95.3±4.2) beats per minucte between the 4th year and the 5th year. P wave′s amplitude, duration, amplitude multiplied by duration of recipient heart in lead Ⅱ were (0.066±0.055) mV, (52.8±34.7) ms, (4.67±4.95) mV·ms at 1 month after OHT, (0.043±0.040)mV, (44.4±40.5) ms , (3.11±3.61) mV·ms between the 1st year and 2nd year after OHT. The absolute value of P-wave(originating from the donor heart) terminal force in chest leads increased in 48.99%(461/941) patients post OHT, the P-wave terminal force of V1 , V2 and V3 were -0.044(-0.066, -0.028), -0.060(-0.087, -0.038), -0.035(-0.056, 0) mm·s. Notched P wave in chest leads was presented in 10.31%(97/941) patients post OHT. PR segment depression in chest leads occurred in 60.24%(100/166) patients between the 3rd month and the 6th month, the incidence of PR segment depression in V1 , V2 and V3 was 21.04%(198/941), 37.41%(352/941) and 28.69%(270/941), respectively.@*Conclusions@#OHT is related to significantly changed ECGs. The mean HR increased significantly after OHT, then decreased gradually after half a year to one year, but it was still higher than preoperative mean HR after five or six years; the P waves of donor heart were usually inconspicuous or small in first month after OHT, and they became bigger after 2 months, and their duration and amplitude then became relatively steady afterwards. ECGs rotation, especially the clockwise rotation, was common post OHT. A variety of arrhythmias originating from the donor heart including sinus tachycardia and incomplete right bundle branch block could be found. Pseudo complete atrioventricular block could also be found in the early phase after OHT. With the extension of time, the incidence of double sinus rhythm reduced gradually. The atrial rate and P wave of recipient heart presented with a tendency to become lower. The absolute value of P-waves(originating from the donor heart) terminal force in chest leads (mainly V1, V2 and V3) increased, notched P waves in chest leads (mainly V1, V2) and PR segments depression in chest leads (mainly V2, V3 and V4) also belong to typical post OHT ECGs features.
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Objective To investigate the prevalence of osteoporosis,osteopenia,fall and brittle fracture and their associated factors in men aged 80 years and over.Methods In a prospective study,184 study subjects with good self-care ability aged 80 years and over were enrolled.The questionnaire included living habits,falls,comorbidities,related symptoms and medicines.The bone mineral density,hand-grip strength,gait speed,timed up and go test(TUG),chair rising test(CRT),bone turnover markers and related hormones were measured.Binary Logistic regression model was used to analyze associated factors for osteoporosis,osteopenia,fall and brittle fracture.Results The prevalence of osteoporosis (OP)and osteopenia(OPA) were 12.5 ％ (23/184) and 45.1％ (83/184) respectively in this study.The height,weight and body mass index were lower,and serum levels of procollagen type 1 N terminal propeptide(P1NP)and C-telopeptides of type 1 collagen(s-CTx)were higher in osteoporosis group than in normal bone mass(NBM) group(P＜0.05,P＜0.01).The estradiol levels were lower in OP and OPA group than in NBM group(P＜ 0.05).The risk factors for OP and OPA included smoking(OR =3.607,P＜0.05),decreased body weight (OR=0.823,P ＜ 0.05) and elevated S-CTx level (OR =12.427,P ＜ 0.01).55.4％ (102/184) of study subjects had fall history after 80-year old.The prevalence of fragile fracture was 17.4％ (4/23),18.1 ％ (15/ 83)and 3.8％(3/78)in OP,OPA and NBM groups respectively,with total prevalence of 12.0％ (22/184).The risk factors for fragile fracture were a decreased total hip BMD(OR 0.017,P＜0.05)and fall history after 80-year-old(OR 13.126,P ＜ 0.05).Conclusions Based on associated factors of osteoporosis,osteopenia,falls and fragile fracture in male aged 80 years and over,the primary and secondary prevention of osteoporosis may need a comprehensive geriatric intervention including lifestyle adjustment,fall prevention and pharmacologic treatments.
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Objective To evaluate the impact of integrated information management platform on life style of diabetic patients. Methods A total of 84 diabetic patients were assigned to the intervention group and the control group by random digits table method with 42 cases each. All patients were in the hospital and after discharge given conventional three-tier management model. The intervention group was given comprehensive information management platform, three-tier management model mediated on this basis. The life style, fasting blood glucose, glycated hemoglobin were collected and compared between the two groups before and after intervention. Results After 9 months of intervention, the dietary pattern of the intervention group was more in line with the Chinese Dietetic Association's recommended dietary standard, in which staple food decreased from (343.90 ± 225.61) g before intervention to (311.71 ± 144.46) g, and meat decreased from (61.52 ± 59.73) g before intervention to (50.07 ± 36.16) g, and the lipid content decreased from (32.67 ± 21.31) g before intervention to (28.57 ± 19.52) g, compared with the control group (376.49 ± 129.58), (73.90 ± 55.15), (45.78 ± 20.03) g, there were significant differences(t =2.076, 2.278, 3.841, all P<0.05). The number of physical exercises increased from 30 before intervention to 37 cases, the number of moderate exercise increased from 12 cases before intervention to 20 cases, and the median of exercise scores increased from 11.000 (26.500) points before intervention to 33.000 (23.500) points, compared with the control group 15.000(18.000) points, there was significant differences (Z =3.687, P<0.01). The fasting blood glucose, glycated hemoglobin were (7.73 ± 1.31) mmol/L, (6.75 ±1.81)% after intervention and 8.000(2.200) mmol/L, 7.600(1.600)%before intervention in the intervention group, compared with the control group (8.60 ± 2.25) mmol/L, (8.81 ± 2.63)%, there were significant differences(t =2.111, 4.062, P<0.05 or 0.01). Conclusions Integrated information management platform management mode three-mediated diabetes may urge to improve the existing way of life, better control of blood sugar.
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Objective To investigate the application of functional assessment to determine the needs of intermediate care services of elderly,and to analyze the needs of intermediate care services of elderly patients in different grades of hospital,different departments and different age.Method 2481 cases of patients aged over 60 years hospitalized due to acute diseases were collected.The ability of activities of daily living (ADL) scale (Barthel index) and limb function were determined in patients aged over 60 years within 1 week after admission as acute diseases.According to the clinical data and scoring scales,the patients were divided into three groups of self-care group without declined independent function of life with Barthel index ＞ 95 points;intermediate care group in whom the ability of daily activities was decreased due to the acute diseases,the function of the body was decreased,and Barthel index was between 45 ～ 95 points;and long-term care group with long term bed rest,severely declined autonomic function or complete dependence and Barthel index less than 45 points,and no opportunity of further recovery.A total of 382 elderly patients (195 male) were in intermediate care group.Analyzed were the intermediate care needs of elderly patients in different levels of hospitals,different departments (including respiratory,cardiovascular,emergency department,geriatrics) and different age.Results The proportion of needs of intermediate care services was 16.1％ (194/1205) in third grade hospitals,24.3％ (33/136) in grade 2 hospitals,38.1 ％ (91/239) in grade 1 hospitals,and 7.1％ (64/901) in community hospital.In general hospital the proportion of needs of intermediate care services were 24.5 ％ (13/53) in emergency department,12.1％ (4/33) in cardiology department,14.6％ (6/41) in respiratory department,and 10.4％ (7/ 67) in geriatric department.The proportion of needs of intermediate care services was 19.0％ (22/ 116) in age group of 60～69,42.2％ (62/147) in age groupof 70～79,and 28.6％ (34/119) in age group of over 80 years.Conclusion The needs of intermediate care services are different in different age groups.Patients aged 70 ～ 79 years have the highest needs of intermediate care services.The needs of intermediate care services are different in different grade levels of hospitals and in different departments.
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Objective To evaluate the uncertainty of the pseudo-ginsenoside GQ (PGQ) concentration in human plasma by HPLC-MS/MS.Methods The whole process of PGQ determination by HPLC-MS/MS in human plasma was evaluated and the uncertainty caused by repeatability,weighing,standard solution preparation,biological sample preparation,extraction recovery process,recovery,instrument precision and calibration curve fitting were evaluated,respectively.The combined and expanded uncertainty values were both calculated.Results The expanded uncertainty values for low (15.16 ng·mL-1),medium (2 516.67 ng·mL-1) and high (3 902.00 ng·mL-1) levels of PGQ were 1.39,177.74 and 262.69 ng·mL-1,respectively (P =95 ％,k =2).Conclusion The uncertainty of the PGQ determination in human plasma by HPLC-MS/MS is mainly caused by recovery,repeatabihty and sample preparation at low concentration,by sample preparation and recovery at medium and high concentration.
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Objective To evaluate the protective value of cardioplegia solution plus metformin in different cardiac arrest time and concentration of metformin in isolated rat hearts .Methods There were 36 male Sprague–Dawley rats divided into six groups randomly, according to the duration of cardioplegic arrest(30 min or 60min) and the concentrations of metformin(50μmol/L or 100 μmol/L) .Langendorff-perfused Sprague-Dawley rat hearts were perfused for 20 minutes with Krebs-Henseleit buffer followed by 30 or 60 minutes of crystalloid cardioplegia or plus metformin (50 or 100 μmol/L) and 60 minutes of reperfu-sion.The left ventricular performance was recorded at 5 time points.The expressions of AMPKαand phosphorylation of AMPKαwere detected by western Blot.The changes of myocardial mitochondria were observed under transmission electron mi-croscope.Results There were no significant differences in Con(A), 50(A) and 100(A) groups in LVDP, ±dp/dtmax and HR.Compared with Con(B) group subjected to 60 minutes of ischemia followed by 60 minutes of reperfusion, the 100(B) group significantly improved myocardial performance , and the ratio of p-AMPKα/AMPKαwas the highest in all 6 groups.The structure of myocardial mitochondria in 100(B) group was better protected than that of Con(B) group.Conclusion These findings suggested that the left ventricular performance was protected in rat heart perfused by cardioplegia plus 100 μmol/L after 60 minutes cardioplegic arrest .The mechanism may be the activation of AMPK and the protection of structures of myocardial mitochondria.
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Objective To investigate the effect and mechanism of adenovirus vector mediated SOCS 3 gene transfection in CD4+ Th cell differentiation and expression of inflammatory cytokines of mouse .Methods The CD4+ Th cells were isolated from spleen of C57bl/6 mouse and cultured .Ad‐SOCS3 were transfected into the CD4+ Th cells .PHA was used for culturing with the CD4+ Th cells .RT‐PCR were used to detect the mRNA expression ,and Western blot were used to detect the protein expression of cytokines .Results Compared with the control group ,the gene and protein expression of T‐bet ,IL‐2 ,IFN‐γ,STAT4 and IL‐12Rβ2 in the transfected group were significantly down‐regulated ,the gene and protein expression of SOCS3 ,GATA‐3 ,IL‐4 ,IL‐6 ,IL‐10 and STAT6 were significantly up‐regulated(P<0 .01) .Conclusion The results indicate that SOCS3 gene transfection can up‐regu‐late SOCS3 mRNA and protein expression in the CD4+ Th cells ,down‐regulate the JAK/STAT pathway ,inhibition of Th1 cell dif‐ferentiation ,and down regulation of inflammatory cytokine gene and protein expression ,and indirectly promote Th2 cell differentia‐tion ,and up the corresponding inflammatory cytokine gene and protein expression .
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Objective Although heart transplantation (HTx) has become a standard therapy for end-stage heart diseases,experience with pediatric HTx is limited in China.In this article,we will try to provide the experience with indications,complications,perioperative management,immunosuppressive therapy,and survival for pediatric HTx based on our clinical work.Method This is a retrospective chart review of the pediatric patients undergoing HTx at Department of Cardiovascular Surgery of Union Hospital from September 2008 to December 2015.We summarized the indications,surgical variables,postoperative complications,and survival for these patients.Result Twenty-three pediatric patients presented for HTx at Union Hospital of Tongji Medical College,of whom 12 were male.The age at the time of transplantation ranged from 3 months to 18years (median 14 years).Patient weight ranged from 5.2 kg to 57.0 kg (median 36.0 kg).Pretransplant diagnosis included cardiomyopathy (16 cases),complex congenital heart disease (5cases) and tumors (2 cases).All recipients received ABO compatible donor hearts.Postoperative complications occurred in 14 patients,including cardiac dysfunction,arrhythmia,pulmonary infection,renal dysfunction,and rejection.Two of them experienced cardiac failure and required extracorporeal membrane oxygenation.The immunosuppression regimen was comprised of prednisone,a calcineurin inhibitor,and mycophenolate.All patients recovered with New York Heart Association (NYHA) Class Ⅰ Ⅱ cardiac function and were discharged.Only one patient suffered sudden death 19 months after transplantation.Conclusion Orthotopic HTx is a promising therapeutic option with satisfactory survival for the pediatric population in China with end-stage heart disease.